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Industrial Automation

CS1W-EIP21 / EIP21S

CS-series EtherNet/IP Unit

CS1W-EIP21 / EIP21S

EtherNet/IP unit with tag data link capacity of 180,000 words or more

Features
Lineup
Specifications
Dimensions
Catalog / Manual / CAD / Software

Catalog
Manual
CAD

English

Global Edition

Please note some product models not sold in Australia may be included in the following manual(s) for our global customers.

*It is recommended to select “Save” from the right-click due to large size of manual PDF data.

*The manual which name begins with "Instruction Sheet" is a simplified manual supplied with the product.
Type All Clear	Manual Name	Catalog Number [size]	Last Update
Manual	C[]1W-EIP21(S), CJ2H-CPU6[]-EIP, CJ2M-CPU3[], CJ3M-CPU3[] EtherNet/IP™ Units Operation Manual	W465-E1-16 [11457KB]	Oct 01, 2026 20261001	0010 030_Manual	C[]1W-EIP21(S), CJ2H-CPU6[]-EIP, CJ2M-CPU3[], CJ3M-CPU3[] EtherNet/IP™ Units Operation Manual
Manual	CS/CJ/CP/NSJ Series Communications Commands Reference Manual	W342-E1-19 [3117KB]	Oct 01, 2026 20261001	0010 030_Manual	CS/CJ/CP/NSJ Series Communications Commands Reference Manual
Technical Guide	EtherNet/IP and Ethernet Units → Enhanced Security Units Replacement Guide	P152-E1-04 [6247KB]	Oct 01, 2026 20261001	0020 032_Technical Guide	EtherNet/IP and Ethernet Units → Enhanced Security Units Replacement Guide
Technical Guide	Security Guideline for CS/CJ/CP-series CPU Unit	P176-E1-02 [722KB]	Oct 01, 2026 20261001	0020 032_Technical Guide	Security Guideline for CS/CJ/CP-series CPU Unit
Instruction Manual	CS1W-EIP21 EtherNet/IP Unit Instruction Sheet (Safety Precautions) (ENG/JPN)	9454196-9D [5370KB]	Dec 10, 2018 20181210	0030 031_Instruction Manual	CS1W-EIP21 EtherNet/IP Unit Instruction Sheet (Safety Precautions) (ENG/JPN)

Product Category

Automation Systems
- Programmable Controllers
  - CS1
    - CPU Bus Units
      - CS1W-EIP21 / EIP21S
      - CS1W-CLK
      - CS1W-FLN22
      - CS1W-LCB01 / LCB05
      - CS1D-ETN21D
      - CS1W-PRM21

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